must fiddle
Regular verb: fiddle - fiddled- fiddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must fiddle
you must fiddle
she must fiddle
we must fiddle
you must fiddle
they must fiddle 	I must be fiddling
you must be fiddling
she must be fiddling
we must be fiddling
you must be fiddling
they must be fiddling	I must have fiddled
you must have fiddled
she must have fiddled
we must have fiddled
you must have fiddled
they must have fiddled	I must have been fiddling
you must have been fiddling
she must have been fiddling
we must have been fiddling
you must have been fiddling
they must have been fiddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't fiddle
you mustn't fiddle
she mustn't fiddle
we mustn't fiddle
you mustn't fiddle
they mustn't fiddle 	I mustn't be fiddling
you mustn't be fiddling
she mustn't be fiddling
we mustn't be fiddling
you mustn't be fiddling
they mustn't be fiddling	I mustn't have fiddled
you mustn't have fiddled
she mustn't have fiddled
we mustn't have fiddled
you mustn't have fiddled
they mustn't have fiddled	I mustn't have been fiddling
you mustn't have been fiddling
she mustn't have been fiddling
we mustn't have been fiddling
you mustn't have been fiddling
they mustn't have been fiddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I fiddle?
must you fiddle?
must she fiddle?
must we fiddle?
must you fiddle?
must they fiddle? 	must I be fiddling?
must you be fiddling?
must she be fiddling?
must we be fiddling?
must you be fiddling?
must they be fiddling? 	must I have fiddled?
must you have fiddled?
must she have fiddled?
must we have fiddled?
must you have fiddled?
must they have fiddled? 	must I have been fiddling?
must you have been fiddling?
must she have been fiddling?
must we have been fiddling?
must you have been fiddling?
must they have been fiddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I fiddle?
mustn't you fiddle?
mustn't she fiddle?
mustn't we fiddle?
mustn't you fiddle?
mustn't they fiddle? 	mustn't I be fiddling?
mustn't you be fiddling?
mustn't she be fiddling?
mustn't we be fiddling?
mustn't you be fiddling?
mustn't they be fiddling? 	mustn't I have fiddled?
mustn't you have fiddled?
mustn't she have fiddled?
mustn't we have fiddled?
mustn't you have fiddled?
mustn't they have fiddled? 	mustn't I have been fiddling?
mustn't you have been fiddling?
mustn't she have been fiddling?
mustn't we have been fiddling?
mustn't you have been fiddling?
mustn't they have been fiddling?